Sheet lifter



FIG. 1 is a perspective view of the sheet lifter showing our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is front view thereof; and,

FIG. 7 is a back view thereof.

The portions shown in phantom lines are not part of the claimed invention, but are included to show environment. 

The ornamental design for a sheet lifter, as shown and described. 